Since 1940, 4 pitchers are tied for winning the most games by a rookie, with 21 wins. The first three are Larry Jansen in 1947, Dave Ferriss in 1945 and Bill Voiselle in 1944.

Since 1940, 4 pitchers are tied for winning the most games by a rookie, with 21 wins. The first three are Larry Jansen in 1947, Dave Ferriss in 1945 and Bill Voiselle in 1944.
NAME | W | SEASON | TM | L | W% | G | GS | ERA | SO | CG | SHO | SV | IP | H | ER | R | HR | BB | HBP | GF | IBB | TBF | WP | K/9 | BB/9 | K/BB | HR/9 | K% | BB% | WHIP | BABIP | RA | ERA- | FIP | FIP- | H/9 | PRAA | |
---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
![]() | Larry Jansen | 21 | 1947 | ![]() | 5 | .808 | 42 | 30 | 3.16 | 104 | 20 | 1 | 1 | 248.0 | 241 | 87 | 102 | 22 | 57 | 1 | 5 | 985 | 2 | 3.77 | 2.07 | 1.82 | 0.80 | 10.6 | 5.8 | 1.20 | .273 | 3.70 | 77 | 3.51 | 87 | 8.75 | 14.4 | |
![]() | Dave Ferriss | 21 | 1945 | ![]() | 10 | .677 | 35 | 31 | 2.96 | 94 | 26 | 5 | 2 | 264.2 | 263 | 87 | 101 | 6 | 85 | 7 | 4 | 1,103 | 4 | 3.20 | 2.89 | 1.11 | 0.20 | 8.5 | 7.7 | 1.31 | .282 | 3.43 | 85 | 3.17 | 89 | 8.94 | 12 | |
![]() | Bill Voiselle | 21 | 1944 | ![]() | 16 | .568 | 43 | 41 | 3.02 | 161 | 25 | 1 | 0 | 312.2 | 276 | 105 | 138 | 31 | 118 | 4 | 1 | 1,327 | 7 | 4.63 | 3.40 | 1.36 | 0.89 | 12.1 | 8.9 | 1.26 | .242 | 3.97 | 82 | 3.97 | 107 | 7.94 | -9 | |
![]() | Johnny Beazley | 21 | 1942 | ![]() | 6 | .778 | 43 | 23 | 2.13 | 91 | 13 | 3 | 3 | 215.1 | 181 | 51 | 67 | 4 | 73 | 3 | 15 | 890 | 7 | 3.80 | 3.05 | 1.25 | 0.17 | 10.2 | 8.2 | 1.18 | .246 | 2.80 | 63 | 2.87 | 82 | 7.57 | 15.3 | |
![]() | Tom Browning | 20 | 1985 | ![]() | 9 | .690 | 38 | 38 | 3.55 | 155 | 6 | 4 | 0 | 261.1 | 242 | 103 | 111 | 29 | 73 | 3 | 0 | 8 | 1,083 | 2 | 5.34 | 2.51 | 2.12 | 1.00 | 14.3 | 6.7 | 1.21 | .259 | 3.82 | 95 | 3.81 | 102 | 8.33 | -1.9 |
![]() | Bob Grim | 20 | 1954 | ![]() | 6 | .769 | 37 | 20 | 3.26 | 108 | 8 | 1 | 1 | 199.0 | 175 | 72 | 78 | 9 | 85 | 3 | 8 | 825 | 4 | 4.88 | 3.84 | 1.27 | 0.41 | 13.1 | 10.3 | 1.31 | .268 | 3.53 | 92 | 3.23 | 91 | 7.91 | 7.1 | |
![]() | Harvey Haddix | 20 | 1953 | ![]() | 9 | .690 | 36 | 33 | 3.06 | 163 | 19 | 6 | 1 | 253.0 | 220 | 86 | 97 | 24 | 69 | 4 | 2 | 1,031 | 9 | 5.80 | 2.45 | 2.36 | 0.85 | 15.8 | 6.7 | 1.14 | .254 | 3.45 | 71 | 3.40 | 79 | 7.83 | 25.1 | |
![]() | Alex Kellner | 20 | 1949 | ![]() | 12 | .625 | 38 | 27 | 3.75 | 94 | 19 | 0 | 1 | 245.0 | 243 | 102 | 120 | 18 | 129 | 2 | 9 | 1,069 | 7 | 3.45 | 4.74 | 0.73 | 0.66 | 8.8 | 12.1 | 1.52 | .272 | 4.41 | 89 | 4.30 | 102 | 8.93 | -2.3 | |
![]() | Gene Bearden | 20 | 1948 | ![]() | 7 | .741 | 37 | 29 | 2.43 | 80 | 15 | 6 | 1 | 229.2 | 187 | 62 | 72 | 9 | 106 | 3 | 4 | 935 | 5 | 3.13 | 4.15 | 0.75 | 0.35 | 8.6 | 11.3 | 1.28 | .242 | 2.82 | 60 | 3.90 | 99 | 7.33 | 0.4 | |
![]() | Mark Fidrych | 19 | 1976 | ![]() | 9 | .679 | 31 | 29 | 2.34 | 97 | 24 | 4 | 0 | 250.1 | 217 | 65 | 76 | 12 | 53 | 3 | 2 | 3 | 996 | 6 | 3.49 | 1.91 | 1.83 | 0.43 | 9.7 | 5.3 | 1.08 | .247 | 2.73 | 63 | 3.15 | 86 | 7.80 | 13.7 |
![]() | Jerry Koosman | 19 | 1968 | ![]() | 12 | .613 | 35 | 34 | 2.08 | 178 | 17 | 7 | 0 | 263.2 | 221 | 61 | 72 | 16 | 69 | 8 | 0 | 7 | 1,058 | 8 | 6.08 | 2.36 | 2.58 | 0.55 | 16.8 | 6.5 | 1.10 | .260 | 2.46 | 70 | 2.70 | 96 | 7.54 | 3.7 |
![]() | Wally Bunker | 19 | 1964 | ![]() | 5 | .792 | 29 | 29 | 2.69 | 96 | 12 | 1 | 0 | 214.0 | 161 | 64 | 72 | 17 | 62 | 3 | 0 | 5 | 850 | 3 | 4.04 | 2.61 | 1.55 | 0.71 | 11.3 | 7.3 | 1.04 | .214 | 3.03 | 77 | 3.65 | 100 | 6.77 | -0.2 |
![]() | Gary Peters | 19 | 1963 | ![]() | 8 | .704 | 41 | 30 | 2.33 | 189 | 13 | 4 | 1 | 243.0 | 192 | 63 | 69 | 9 | 68 | 8 | 4 | 2 | 978 | 5 | 7.00 | 2.52 | 2.78 | 0.33 | 19.3 | 7.0 | 1.07 | .260 | 2.56 | 67 | 2.34 | 67 | 7.11 | 32.1 |
![]() | Jack Sanford | 19 | 1957 | ![]() | 8 | .704 | 33 | 33 | 3.08 | 188 | 15 | 3 | 0 | 236.2 | 194 | 81 | 94 | 22 | 94 | 3 | 0 | 2 | 989 | 12 | 7.15 | 3.57 | 2.00 | 0.84 | 19.0 | 9.5 | 1.22 | .252 | 3.57 | 80 | 3.31 | 87 | 7.38 | 12.6 |
![]() | Dick Newsome | 19 | 1941 | ![]() | 10 | .655 | 36 | 29 | 4.13 | 58 | 17 | 2 | 0 | 213.2 | 235 | 98 | 115 | 13 | 79 | 7 | 4 | 944 | 6 | 2.44 | 3.33 | 0.73 | 0.55 | 6.1 | 8.4 | 1.47 | .282 | 4.84 | 97 | 4.12 | 99 | 9.90 | 1.6 | |
![]() | Elmer Riddle | 19 | 1941 | ![]() | 4 | .826 | 33 | 22 | 2.24 | 80 | 15 | 4 | 1 | 216.2 | 180 | 54 | 68 | 8 | 59 | 5 | 4 | 884 | 2 | 3.32 | 2.45 | 1.36 | 0.33 | 9.0 | 6.7 | 1.10 | .235 | 2.82 | 62 | 3.29 | 89 | 7.48 | 9.6 | |
![]() | Lance Lynn | 18 | 2012 | ![]() | 7 | .720 | 35 | 29 | 3.78 | 180 | 0 | 0 | 0 | 176.0 | 168 | 74 | 76 | 16 | 64 | 10 | 2 | 3 | 744 | 3 | 9.20 | 3.27 | 2.81 | 0.82 | 24.2 | 8.6 | 1.32 | .321 | 3.89 | 98 | 3.48 | 90 | 8.59 | 7.4 |
![]() | Carl Morton | 18 | 1970 | ![]() | 11 | .621 | 43 | 37 | 3.60 | 154 | 10 | 4 | 0 | 284.2 | 281 | 114 | 123 | 27 | 125 | 4 | 1 | 17 | 1,218 | 2 | 4.87 | 3.95 | 1.23 | 0.85 | 12.6 | 10.3 | 1.43 | .280 | 3.89 | 87 | 4.14 | 106 | 8.88 | -6.8 |
![]() | Chuck Estrada | 18 | 1960 | ![]() | 11 | .621 | 36 | 25 | 3.58 | 144 | 12 | 1 | 2 | 208.2 | 162 | 83 | 87 | 18 | 101 | 15 | 6 | 3 | 883 | 2 | 6.21 | 4.36 | 1.43 | 0.78 | 16.3 | 11.4 | 1.26 | .238 | 3.75 | 97 | 3.94 | 104 | 6.99 | -4 |
![]() | Ken Burkhart | 18 | 1945 | ![]() | 8 | .692 | 42 | 22 | 2.90 | 67 | 12 | 4 | 3 | 217.1 | 206 | 70 | 76 | 9 | 66 | 3 | 12 | 901 | 3 | 2.77 | 2.73 | 1.02 | 0.37 | 7.4 | 7.3 | 1.25 | .261 | 3.15 | 76 | 3.41 | 92 | 8.53 | 6.9 | |
![]() | Justin Verlander | 17 | 2006 | ![]() | 9 | .654 | 30 | 30 | 3.63 | 124 | 1 | 1 | 0 | 186.0 | 187 | 75 | 78 | 21 | 60 | 6 | 0 | 1 | 776 | 5 | 6.00 | 2.90 | 2.07 | 1.02 | 16.0 | 7.7 | 1.33 | .294 | 3.77 | 80 | 4.34 | 96 | 9.05 | 3.6 |
![]() | CC Sabathia | 17 | 2001 | ![]() | 5 | .773 | 33 | 33 | 4.39 | 171 | 0 | 0 | 0 | 180.1 | 149 | 88 | 93 | 19 | 95 | 7 | 0 | 1 | 763 | 7 | 8.53 | 4.74 | 1.80 | 0.95 | 22.4 | 12.5 | 1.35 | .276 | 4.64 | 98 | 4.21 | 94 | 7.44 | 5.2 |
![]() | Freddy Garcia | 17 | 1999 | ![]() | 8 | .680 | 33 | 33 | 4.07 | 170 | 2 | 1 | 0 | 201.1 | 205 | 91 | 96 | 18 | 90 | 10 | 0 | 4 | 888 | 12 | 7.60 | 4.02 | 1.89 | 0.80 | 19.1 | 10.1 | 1.47 | .312 | 4.29 | 87 | 4.09 | 87 | 9.16 | 13.7 |
![]() | Dave Fleming | 17 | 1992 | ![]() | 10 | .630 | 33 | 33 | 3.39 | 112 | 7 | 4 | 0 | 228.1 | 225 | 86 | 95 | 13 | 60 | 4 | 0 | 3 | 946 | 8 | 4.41 | 2.36 | 1.87 | 0.51 | 11.8 | 6.3 | 1.25 | .280 | 3.74 | 86 | 3.38 | 86 | 8.87 | 14.2 |
![]() | Tom Gordon | 17 | 1989 | ![]() | 9 | .654 | 49 | 16 | 3.64 | 153 | 1 | 1 | 1 | 163.0 | 122 | 66 | 67 | 10 | 86 | 1 | 16 | 4 | 677 | 12 | 8.45 | 4.75 | 1.78 | 0.55 | 22.6 | 12.7 | 1.28 | .262 | 3.70 | 94 | 3.28 | 89 | 6.74 | 7.3 |
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